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cmd/tailscale/cli: add ts2021 debug flag to set a dial plan

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Updates tailscale/corp#32534

Change-Id: Ief4ee0a263ea1edbf652b74d8c335c1e5ee209d7
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2025-09-20 15:55:33 -07:00 committed by Brad Fitzpatrick
parent 798fddbe5c
commit d7ec043306
1 changed files with 16 additions and 0 deletions
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16
cmd/tailscale/cli/debug.go
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@ -289,6 +289,7 @@ func debugCmd() *ffcli.Command {
fs.IntVar(&ts2021Args.version, "version", int(tailcfg.CurrentCapabilityVersion), "protocol version")
fs.BoolVar(&ts2021Args.verbose, "verbose", false, "be extra verbose")
fs.StringVar(&ts2021Args.aceHost, "ace", "", "if non-empty, use this ACE server IP/hostname as a candidate path")
fs.StringVar(&ts2021Args.dialPlanJSONFile, "dial-plan", "", "if non-empty, use this JSON file to configure the dial plan")
return fs
})(),
},
@ -967,6 +968,8 @@ var ts2021Args struct {
version int // 27 or whatever
verbose bool
aceHost string // if non-empty, FQDN of https ACE server to use ("ace.example.com")
dialPlanJSONFile string // if non-empty, path to JSON file [tailcfg.ControlDialPlan] JSON
}
func runTS2021(ctx context.Context, args []string) error {
@ -1051,6 +1054,18 @@ func runTS2021(ctx context.Context, args []string) error {
return fmt.Errorf("creating netmon: %w", err)
}
var dialPlan *tailcfg.ControlDialPlan
if ts2021Args.dialPlanJSONFile != "" {
b, err := os.ReadFile(ts2021Args.dialPlanJSONFile)
if err != nil {
return fmt.Errorf("reading dial plan JSON file: %w", err)
}
dialPlan = new(tailcfg.ControlDialPlan)
if err := json.Unmarshal(b, dialPlan); err != nil {
return fmt.Errorf("unmarshaling dial plan JSON file: %w", err)
}
}
noiseDialer := &controlhttp.Dialer{
Hostname: ts2021Args.host,
HTTPPort: "80",
@ -1058,6 +1073,7 @@ func runTS2021(ctx context.Context, args []string) error {
MachineKey: machinePrivate,
ControlKey: keys.PublicKey,
ProtocolVersion: uint16(ts2021Args.version),
DialPlan: dialPlan,
Dialer: dialFunc,
Logf: logf,
NetMon: netMon,